CN111895024A - Hydraulic damper with external leakage service prevention function - Google Patents
Hydraulic damper with external leakage service prevention function Download PDFInfo
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- CN111895024A CN111895024A CN202010619058.XA CN202010619058A CN111895024A CN 111895024 A CN111895024 A CN 111895024A CN 202010619058 A CN202010619058 A CN 202010619058A CN 111895024 A CN111895024 A CN 111895024A
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- end cover
- oil tank
- damper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
- F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a hydraulic damper with an external leakage service-preventing function, which comprises a right pin head, a right end cover, an outer cylinder barrel, an auxiliary oil tank right piston, an inner cylinder barrel, a damper piston rod, an auxiliary oil tank left piston, a left end cover, a left pin head, an auxiliary oil tank piston return spring and a middle cylinder barrel. According to the invention, through an innovative structural design, the double-layer sealing device is arranged between the piston rod and the end cover of the hydraulic damper, the oil leakage groove is formed between the two layers of sealing devices, and the oil leakage groove is led out into the low-pressure auxiliary oil tank through a related oil way, so that the external leakage risk of the hydraulic damper is greatly reduced, the reliable work of the hydraulic damper is ensured, and the hydraulic damper has a wide application prospect.
Description
Technical Field
The invention relates to a hydraulic damper, in particular to a hydraulic damper with an external leakage service-proof function, and belongs to the fields of machinery, hydraulic pressure, damping buffering, shock resistance and the like.
Background
At present, the hydraulic damper is widely applied to the field of anti-seismic and shock absorption. In the application process of the hydraulic damper, the oil leakage condition of the hydraulic damper often occurs, once the oil leakage occurs to the hydraulic damper, on one hand, the environment can be polluted, on the other hand, the hydraulic damper can lose the damping function and cannot work normally. The leakage form of the hydraulic damper comprises an inner leakage form and an outer leakage form, particularly, the outer leakage needs to be strictly controlled, in some special occasions, the outer leakage of the hydraulic damper is strictly forbidden, and the outer leakage of a hydraulic oil cylinder is commonly existed in dynamic sealing occasions, such as between a piston rod and an end cover of the hydraulic damper.
Disclosure of Invention
In order to effectively solve the problem of external leakage of the hydraulic damper, the invention provides the hydraulic damper with the function of external leakage prevention.
The technical scheme of the invention is as follows:
a hydraulic damper with an external leakage service-prevention function comprises a right pin head, a right end cover, an outer cylinder barrel, an auxiliary oil tank right piston, an inner cylinder barrel, a damper piston rod, an auxiliary oil tank left piston, a left end cover, a left pin head, an auxiliary oil tank piston return spring and a middle cylinder barrel;
a right end cover first step, a right end cover second step and a right end cover third step are sequentially processed on the outer circumferential wall of the right end cover from left to right, and a right end cover oil through hole is radially processed at the upper part of the right end cover second step; a right end cover damping hole is formed in the upper side of the left part of the right end cover, the left end of the right end cover damping hole penetrates through the left end face of the right end cover, and the right end of the right end cover damping hole is communicated with the right end cover oil through hole; a right end cover normally open one-way valve is mounted on the lower side of the left part of the right end cover, an outlet of the right end cover normally open one-way valve is communicated to the left end face of the right end cover, and an inlet of the right end cover normally open one-way valve is communicated with the right end cover oil through hole; an auxiliary oil tank right piston right side inner ring groove is processed on the inner side of the right end of the auxiliary oil tank right piston, an auxiliary oil tank right piston right side outer ring groove is processed on the outer side of the right end of the auxiliary oil tank right piston, an auxiliary oil tank right piston oil through hole which is radially communicated is processed between the auxiliary oil tank right piston right side inner ring groove and the auxiliary oil tank right piston right side outer ring groove, an auxiliary oil tank right piston left side ring groove is processed on the inner side of the left end of the auxiliary oil tank right piston, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank right piston, and an auxiliary oil tank right piston inner sealing ring and an; steps are processed at the left end and the right end of the damper piston, a first damper piston oil through hole which is radially communicated is processed on the left step of the damper piston, a second damper piston oil through hole which is radially communicated is processed on the right step of the damper piston, a first damper piston normally-open check valve and a second damper piston normally-open check valve are installed inside the damper piston, the outlet of the first damper piston normally-open check valve is communicated with the first damper piston oil through hole, the outlet of the second damper piston normally-open check valve is communicated with the second damper piston oil through hole, and the inlet of the first damper piston normally-open check valve is communicated with the inlet of the second damper piston normally-open check valve; a damper piston damping hole is formed in the damper piston, the left end of the damper piston damping hole is communicated with a first oil through hole of the damper piston, and the right end of the damper piston damping hole is communicated with a second oil through hole of the damper piston; an auxiliary oil tank left piston left side inner ring groove is processed on the inner side of the left end of the auxiliary oil tank left piston, an auxiliary oil tank left piston left side outer ring groove is processed on the outer side of the left end of the auxiliary oil tank left piston, an auxiliary oil tank left piston oil through hole which is radially communicated is processed between the auxiliary oil tank left piston left side inner ring groove and the auxiliary oil tank left piston left side outer ring groove, an auxiliary oil tank left piston right side ring groove is processed on the inner side of the right end of the auxiliary oil tank left piston, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank left piston, and an auxiliary oil tank left piston inner sealing ring and an auxiliary; a left end cover annular oil groove is processed in the middle of an inner hole of the left end cover, a left end cover first step, a left end cover second step and a left end cover third step are sequentially processed on the outer circumferential wall of the left end cover from right to left, a left end cover oil through hole is radially processed in the upper portion of the left end cover second step, and the left end cover oil through hole is communicated with the left end cover annular oil groove; the right end and the left end of the middle cylinder barrel are respectively provided with a middle cylinder barrel right oil through hole and a middle cylinder barrel left oil through hole which are radially communicated; the right pin head and the right end cover are reliably connected into a whole; the right end of the inner cylinder barrel is sleeved on the first step of the right end cover, and reliable sealing is formed between the right end inner hole of the inner cylinder barrel and the first step of the right end cover; the damper piston and the damper piston rod form reliable connection and sealing; the damper piston and the damper piston rod are inserted into the inner cylinder barrel, and reliable sealing and guiding are formed between the damper piston and the inner cylinder barrel; the auxiliary oil tank right piston, the auxiliary oil tank piston reset spring and the auxiliary oil tank left piston are sequentially sleeved on the outer cylindrical wall of the inner cylinder barrel from left to right, the left end of the auxiliary oil tank piston reset spring is installed into the right annular groove of the auxiliary oil tank left piston, the right end of the auxiliary oil tank piston reset spring is installed into the left annular groove of the auxiliary oil tank right piston, the left end and the right end of the auxiliary oil tank piston reset spring respectively abut against the auxiliary oil tank left piston and the auxiliary oil tank right piston, and reliable sealing is formed between the auxiliary oil tank right piston and the auxiliary oil tank left piston and the outer cylindrical wall of the inner cylinder barrel; the middle cylinder barrel is sequentially sleeved on a left piston of the auxiliary oil tank, a right piston of the auxiliary oil tank and a third step of the right end cover from left to right, and reliable sealing is formed between an inner hole of the middle cylinder barrel and the outer walls of the left piston of the auxiliary oil tank and the right piston of the auxiliary oil tank respectively; the right end of the outer cylinder barrel is reliably connected and sealed with the right end cover; the left end cover is sleeved on the damper piston rod, the first step of the left end cover is inserted into the left end of the inner cylinder barrel, the third step of the left end cover is inserted into the left end of the middle cylinder barrel, and meanwhile, the outermost circumference of the left end cover is inserted into the left end of the outer cylinder barrel; the left end cover and the left end of the outer cylinder barrel form reliable connection and sealing; a reliable seal is formed between the first step of the left end cover and the left end of the inner cylinder barrel; a dustproof device and a sealing device are respectively arranged on the left side of the annular oil groove of the left end cover between the left end cover and the damper piston rod, and reliable dustproof and sealing are formed between the left end cover and the damper piston rod; a sealing device and a guiding device are respectively arranged on the right side of the annular oil groove of the left end cover between the left end cover and the damper piston rod, and reliable sealing and guiding are formed between the left end cover and the damper piston rod; the left pin head is reliably connected with the left end of the damper piston rod; the right inner annular groove of the right piston of the auxiliary oil tank is communicated with the right end cover oil through hole; the inner annular groove on the left side of the left piston of the auxiliary oil tank is communicated with the oil through hole of the left end cover; a damper left working cavity A is formed between the left side of the damper piston and the left end cover, a damper left working cavity B is formed between the right side of the damper piston and the right end cover, and a return spring cavity C is formed between the auxiliary oil tank left piston and the auxiliary oil tank right piston; an auxiliary oil tank left oil chamber D is formed between the left end cover and the auxiliary oil tank left piston; an auxiliary oil tank right oil chamber E is formed between the right end cover and the auxiliary oil tank right piston; an annular oil passage F is formed between the outer wall of the middle cylinder barrel and the inner wall of the outer cylinder barrel; the left end cover annular oil groove, the left end cover oil through hole, the auxiliary oil tank left oil chamber D, the middle cylinder barrel left oil through hole, the annular oil through passage F, the middle cylinder barrel right oil through hole, the auxiliary oil tank right oil chamber E and the right end cover oil through hole are communicated with each other; the hydraulic damper working oil is filled in the damper left working cavity A, the damper left working cavity B, the auxiliary oil tank left oil chamber D, the auxiliary oil tank right oil chamber E, the annular oil passage F and the communicated oil through holes and oil grooves through oil filling ports; and working oil in the annular oil groove of the left end cover is in a low-pressure state.
And the working oil in the auxiliary oil tank left oil chamber D and the auxiliary oil tank right oil chamber E is in a low-pressure state.
The working process is as follows:
when the damper piston rod drives the damper piston to move leftwards at a low speed, the first normally-open check valve of the damper piston and the second normally-open check valve of the damper piston are in a normally-open state. At the moment, on one hand, working oil in the left working cavity A of the damper can flow into the left working cavity B of the damper through the first damper piston oil through hole, the first damper piston normally-open check valve, the second damper piston normally-open check valve and the second damper piston oil through hole, on the other hand, working oil in the left working cavity A of the damper can also flow into the left working cavity B of the damper through the first damper piston oil through hole, the damper piston damping hole and the second damper piston oil through hole, and meanwhile, working oil in the right oil chamber E of the auxiliary oil tank can be supplemented into the left working cavity B of the damper through the right end cover oil through hole and the right end cover normally-open check valve and the right end cover damping hole respectively;
when the damper piston rod drives the damper piston to move rightwards at a low speed, the first normally-open check valve of the damper piston and the second normally-open check valve of the damper piston are in a normally-open state. At the moment, on one hand, the working oil in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole of the damper piston, the second normally open check valve of the damper piston, the first normally open check valve of the damper piston and the first oil through hole of the damper piston, and on the other hand, the working oil in the left working cavity B of the damper can also flow into the left working cavity A of the damper through the second oil through hole of the damper piston, the damping hole of the damper piston and the first oil through hole of the damper piston, and meanwhile, the working oil in the left working cavity B of the damper can flow into the right oil chamber E of the auxiliary oil tank through the normally open check valve of the right end cover and the damping hole of the right end cover respectively;
when the damper piston rod drives the damper piston to move leftwards rapidly, the first normally open check valve of the damper piston is in a locking state. At the moment, the working oil in the left working cavity A of the damper can only flow into the left working cavity B of the damper through the first oil through hole of the damper piston, the damping hole of the damper piston and the second oil through hole of the damper piston, and when the working oil flows through the damping hole of the damper piston, a damping effect is formed, so that a damping force is generated on the damper piston, and the working oil can do work outwards, consume external energy and play a role in shock absorption and shock resistance; because the working oil in the annular oil groove of the left end cover is in a lower pressure state, the risk of leakage of the working oil is reduced, and the working reliability of the oil damper is improved;
when the damper piston rod drives the damper piston to move rightwards rapidly, the second normally-open check valve of the damper piston and the normally-open check valve of the right end cover are in a locking state. At the moment, on the one hand, the working oil in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole of the damper piston, the damping hole of the damper piston and the first oil through hole of the damper piston, on the other hand, the working oil in the left working cavity B of the damper can also flow into the right oil chamber E of the auxiliary oil tank through the damping hole of the right end cover, when the working oil flows through the damping hole of the damper piston and the damping hole of the right end cover, a damping effect is formed, damping force is generated on the damper piston, work is done outwards, external energy is consumed, and the shock absorption and shock resistance effects are achieved.
From the working process analysis of the hydraulic damper, the pressure of the working oil in the annular oil groove of the left end cover is in a lower state, and the sealing device on the left side of the annular oil groove of the left end cover between the left end cover of the hydraulic damper and the damper piston rod is always in a low-pressure working state, so that the risk of external leakage of the working oil is reduced, and the working reliability of the oil damper is improved.
The invention has the following beneficial effects:
according to the invention, the double-layer sealing device is arranged between the piston rod and the end cover of the hydraulic damper, the oil leakage groove is formed between the two layers of sealing devices, and the oil leakage groove is led out into the low-pressure auxiliary oil tank through the related oil way, so that the external leakage risk of the hydraulic damper is greatly reduced, and the reliable work of the hydraulic damper is ensured.
Drawings
The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a hydraulic damper with an external leakage service-proof function comprises a right pin head 1, a right end cover 2, an outer cylinder 3, an auxiliary oil tank right piston 4, an inner cylinder 5, a damper piston 6, a damper piston rod 7, an auxiliary oil tank left piston 8, a left end cover 9, a left pin head 10, an auxiliary oil tank piston return spring 11 and a middle cylinder 12;
a right end cover first step 2-4, a right end cover second step 2-5 and a right end cover third step 2-6 are sequentially processed on the outer circumferential wall of the right end cover 2 from left to right, and a right end cover oil through hole 2-3 is radially processed at the upper part of the right end cover second step 2-5; a right end cover damping hole 2-2 is formed in the upper side of the left portion of the right end cover 2, the left end of the right end cover damping hole 2-2 penetrates through the left end face of the right end cover 2, and the right end of the right end cover damping hole 2-2 is communicated with a right end cover oil through hole 2-3; a right end cover normally-open one-way valve 2-1 is installed on the lower side of the left part of the right end cover 2, an outlet of the right end cover normally-open one-way valve 2-1 is communicated to the left end face of the right end cover 2, and an inlet of the right end cover normally-open one-way valve 2-1 is communicated with a right end cover oil through hole 2-3; an auxiliary oil tank right piston right side inner ring groove 4-1 is processed on the inner side of the right end of the auxiliary oil tank right piston 4, an auxiliary oil tank right piston right side outer ring groove 4-3 is processed on the outer side of the right end of the auxiliary oil tank right piston 4, an auxiliary oil tank right piston oil through hole 4-4 which is radially communicated is processed between the auxiliary oil tank right piston right side inner ring groove 4-1 and the auxiliary oil tank right piston right side outer ring groove 4-3, an auxiliary oil tank right piston left side ring groove 4-2 is processed on the inner side of the left end of the auxiliary oil tank right piston 4, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank right piston 4, and an auxiliary oil tank right piston inner sealing ring and an; steps are respectively processed at the left end and the right end of the damper piston 6, a first damper piston oil through hole 6-1 which is radially communicated is processed on the left step of the damper piston 6, a second damper piston oil through hole 6-4 which is radially communicated is processed on the right step of the damper piston 6, a first damper piston normally-open one-way valve 6-2 and a second damper piston normally-open one-way valve 6-3 are arranged inside the damper piston 6, the outlet of the first damper piston normally-open one-way valve 6-2 is communicated with the first damper piston oil through hole 6-1, the outlet of the second damper piston normally-open one-way valve 6-3 is communicated with the second damper piston oil through hole 6-4, and the inlet of the first damper piston normally-open one-way valve 6-2 is communicated with the inlet of the second damper piston normally-open one-way valve 6-3; a damper piston damping hole 6-5 is formed in the damper piston 6, the left end of the damper piston damping hole 6-5 is communicated with a damper piston first oil through hole 6-1, and the right end of the damper piston damping hole 6-5 is communicated with a damper piston second oil through hole 6-4; an auxiliary oil tank left piston left side inner annular groove 8-1 is processed on the inner side of the left end of the auxiliary oil tank left piston 8, an auxiliary oil tank left piston left side outer annular groove 8-3 is processed on the outer side of the left end of the auxiliary oil tank left piston 8, an auxiliary oil tank left piston oil through hole 8-4 which is radially communicated is processed between the auxiliary oil tank left piston left side inner annular groove 8-1 and the auxiliary oil tank left piston left side outer annular groove 8-3, an auxiliary oil tank left piston right side annular groove 8-2 is processed on the inner side of the right end of the auxiliary oil tank left piston 8, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank left piston 8, and an auxiliary oil tank left piston inner sealing ring and an auxiliary oil tank; a left end cover annular oil groove 9-1 is machined in the middle of an inner hole of the left end cover 9, a left end cover first step 9-3, a left end cover second step 9-4 and a left end cover third step 9-5 are sequentially machined on the outer circumferential wall of the left end cover 9 from right to left, a left end cover oil through hole 9-2 is radially machined in the upper portion of the left end cover second step 9-4, and the left end cover oil through hole 9-2 is communicated with the left end cover annular oil groove 9-1; the right end and the left end of the middle cylinder barrel 12 are respectively provided with a middle cylinder barrel right oil through hole 12-1 and a middle cylinder barrel left oil through hole 12-2 which are radially communicated; the right pin head 1 and the right end cover 2 are reliably connected into a whole; the right end of the inner cylinder 5 is sleeved on the first step 2-4 of the right end cover, and reliable sealing is formed between the inner hole at the right end of the inner cylinder 5 and the first step 2-4 of the right end cover; a reliable connection and sealing is formed between the damper piston 6 and the damper piston rod 7; the damper piston 6 and the damper piston rod 7 are inserted into the inner cylinder 5, and reliable sealing and guiding are formed between the damper piston 6 and the inner cylinder 5; the auxiliary oil tank right piston 4, the auxiliary oil tank piston return spring 11 and the auxiliary oil tank left piston 8 are sequentially sleeved on the outer cylindrical wall of the inner cylinder barrel 5 from left to right, the left end of the auxiliary oil tank piston return spring 11 is installed into an auxiliary oil tank left piston right annular groove 8-2, the right end of the auxiliary oil tank piston return spring 11 is installed into an auxiliary oil tank right piston left annular groove 4-2, the left end and the right end of the auxiliary oil tank piston return spring 11 respectively abut against the auxiliary oil tank left piston 8 and the auxiliary oil tank right piston 4, and reliable sealing is formed between the auxiliary oil tank right piston 4 and the auxiliary oil tank left piston 8 and the outer cylindrical wall of the inner cylinder barrel 5; the middle cylinder barrel 12 is sequentially sleeved on the auxiliary oil tank left piston 8, the auxiliary oil tank right piston 4 and the right end cover third steps 2-6 from left to right, and reliable sealing is formed between the inner hole of the middle cylinder barrel 12 and the outer walls of the auxiliary oil tank left piston 8 and the auxiliary oil tank right piston 4 respectively; the right end of the outer cylinder barrel 3 is reliably connected and sealed with the right end cover 2; the left end cover 9 is sleeved on the damper piston rod 7, the first step 9-3 of the left end cover is inserted into the left end of the inner cylinder 5, the third step 9-5 of the left end cover is inserted into the left end of the middle cylinder 12, and meanwhile, the outermost circumference of the left end cover 9 is inserted into the left end of the outer cylinder 3; the left end cover 9 and the left end of the outer cylinder barrel 3 form reliable connection and sealing; a reliable seal is formed between the first step 9-3 of the left end cover and the left end of the inner cylinder 5; a dustproof device and a sealing device are respectively arranged on the left side of the annular oil groove 9-1 of the left end cover between the left end cover 9 and the damper piston rod 7, and reliable dustproof and sealing are formed between the left end cover 9 and the damper piston rod 7; a sealing device and a guiding device are respectively arranged on the right side of the annular oil groove 9-1 of the left end cover between the left end cover 9 and the damper piston rod 7, and reliable sealing and guiding are formed between the left end cover 9 and the damper piston rod 7; the left pin head 10 and the left end of the damper piston rod 7 form reliable connection; the right inner annular groove 4-1 of the right piston of the auxiliary oil tank is communicated with the right end cover oil through hole 2-3; the left inner annular groove 8-1 of the left piston of the auxiliary oil tank is communicated with the oil through hole 9-2 of the left end cover; a damper left working cavity A is formed between the left side of the damper piston 6 and the left end cover 9; a damper left working cavity B is formed between the right side of the damper piston 6 and the right end cover 2, and a return spring cavity C is formed between the auxiliary oil tank left piston 8 and the auxiliary oil tank right piston 4; an auxiliary oil tank left oil chamber D is formed between the left end cover 9 and the auxiliary oil tank left piston 8; an auxiliary oil tank right oil chamber E is formed between the right end cover 2 and the auxiliary oil tank right piston 4; an annular oil passage F is formed between the outer wall of the middle cylinder barrel 12 and the inner wall of the outer cylinder barrel 3; the left end cover annular oil groove 9-1, the left end cover oil through hole 9-2, the auxiliary oil tank left oil chamber D, the middle cylinder barrel left oil through hole 12-2, the annular oil through path F, the middle cylinder barrel right oil through hole 12-1, the auxiliary oil tank right oil chamber E and the right end cover oil through hole 2-3 are communicated with each other; hydraulic damper working oil is filled in the damper left working cavity A, the damper left working cavity B, the auxiliary oil tank left oil chamber D, the auxiliary oil tank right oil chamber E, the annular oil through passage F and the oil through holes and oil grooves which are communicated with each other through oil filling ports (not marked in the figure); and the working oil in the annular oil groove 9-1 of the left end cover is in a low-pressure state.
And the working oil in the auxiliary oil tank left oil chamber D and the auxiliary oil tank right oil chamber E is in a low-pressure state.
The working process is as follows:
when the damper piston rod 7 drives the damper piston 6 to move leftwards at a low speed, the first normally-open check valve 6-2 and the second normally-open check valve 6-3 of the damper piston are in a normally-open state. At the moment, on one hand, the working oil in the left working cavity A of the damper can flow into the left working cavity B of the damper through the first oil through hole 6-1 of the damper piston, the first normally open check valve 6-2 of the damper piston, the second normally open check valve 6-3 of the damper piston and the second oil through hole 6-4 of the damper piston, on the other hand, the working oil in the left working cavity A of the damper can also flow into the left working cavity B of the damper through the first oil through hole 6-1 of the damper piston, the damping hole 6-5 of the damper piston and the second oil through hole 6-4 of the damper piston, meanwhile, working oil in the right oil chamber E of the auxiliary oil tank can be supplemented into the left working cavity B of the damper through the right end cover oil through hole 2-3 and the right end cover normally open check valve 2-1 and the right end cover damping hole 2-2 respectively;
when the damper piston rod 7 drives the damper piston 6 to move rightwards at a low speed, the damper piston first normally-open check valve 6-2 and the damper piston second normally-open check valve 6-3 are in a normally-open state. At the moment, on one hand, the working oil in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole 6-4 of the damper piston, the second normally open check valve 6-3 of the damper piston, the first normally open check valve 6-2 of the damper piston and the first oil through hole 6-1 of the damper piston, on the other hand, the working oil in the left working cavity B of the damper can also flow into the left working cavity A of the damper through the second oil through hole 6-4 of the damper piston, the damping hole 6-5 of the damper piston and the first oil through hole 6-1 of the damper piston, meanwhile, working oil in the left working cavity B of the damper can respectively flow into the right oil chamber E of the auxiliary oil tank through the right end cover normally open one-way valve 2-1 and the right end cover damping hole 2-2 and the right end cover oil through hole 2-3;
when the damper piston rod 7 drives the damper piston 6 to move leftwards rapidly, the first normally open check valve 6-2 of the damper piston is in a locking state. At the moment, the working oil in the left working cavity A of the damper can only flow into the left working cavity B of the damper through the first oil through hole 6-1 of the damper piston, the damping hole 6-5 of the damper piston and the second oil through hole 6-4 of the damper piston, when the working oil flows through the damping hole 6-5 of the damper piston, a damping effect is formed, a damping force is generated on the damper piston 6, the external work is done outwards, the external energy is consumed, and the shock absorption and shock resistance effects are achieved, meanwhile, the working oil in the right oil chamber E of the auxiliary oil tank can be supplemented into the left working cavity B of the damper through the oil through hole 2-3 of the right end cover and through the normally open check valve 2-1 of the right end cover and the damping hole 2-2 of the right end cover respectively; because the working oil in the annular oil groove 9-1 of the left end cover is in a lower pressure state, the risk of external leakage of the working oil is reduced, and the working reliability of the oil damper is improved;
when the damper piston rod 7 drives the damper piston 6 to move rightwards rapidly, the second normally-open one-way valve 6-3 and the normally-open one-way valve 2-1 of the right end cover of the damper piston are in a locking state. At the moment, on one hand, the working oil in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole 6-4 of the damper piston, the damping hole 6-5 of the damper piston and the first oil through hole 6-1 of the damper piston, on the other hand, the working oil in the left working cavity B of the damper can also flow into the right oil chamber E of the auxiliary oil tank through the damping hole 2-2 of the right end cover and the oil through hole 2-3 of the right end cover, and when the working oil flows through the damping hole 6-5 of the damper piston and the damping hole 2-2 of the right end cover, a damping effect is formed, damping force is generated on the damper piston 6, work is done outwards, external energy is consumed, and a shock absorption and shock resistance effect is achieved.
From the working process analysis of the hydraulic damper, it can be seen that the pressure of the working oil in the left end cover annular oil groove 9-1 is in a low state, and a sealing device between the left end cover 9 and the damper piston rod 7 of the hydraulic damper and on the left side of the left end cover annular oil groove 9-1 is always in a low-pressure working state, so that the risk of working oil leakage is reduced, and the working reliability of the oil damper is improved.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. The utility model provides a hydraulic damper with external leakage service prevention function which characterized in that: the hydraulic cylinder comprises a right pin head (1), a right end cover (2), an outer cylinder barrel (3), an auxiliary oil tank right piston (4), an inner cylinder barrel (5), a damper piston (6), a damper piston rod (7), an auxiliary oil tank left piston (8), a left end cover (9), a left pin head (10), an auxiliary oil tank piston return spring (11) and a middle cylinder barrel (12);
a right end cover first step (2-4), a right end cover second step (2-5) and a right end cover third step (2-6) are sequentially processed on the outer circumferential wall of the right end cover (2) from left to right, and a right end cover oil through hole (2-3) is radially processed at the upper part of the right end cover second step (2-5); a right end cover damping hole (2-2) is formed in the upper side of the left part of the right end cover (2), the left end of the right end cover damping hole (2-2) penetrates through the left end face of the right end cover (2), and the right end of the right end cover damping hole (2-2) is communicated with the right end cover oil through hole (2-3); a right end cover normally-open one-way valve (2-1) is installed on the lower side of the left part of the right end cover (2), an outlet of the right end cover normally-open one-way valve (2-1) is communicated to the left end face of the right end cover (2), and an inlet of the right end cover normally-open one-way valve (2-1) is communicated with the right end cover oil through hole (2-3); an auxiliary oil tank right piston right side inner annular groove (4-1) is machined on the inner side of the right end of the auxiliary oil tank right piston (4), an auxiliary oil tank right piston right side outer annular groove (4-3) is machined on the outer side of the right end of the auxiliary oil tank right piston (4), an auxiliary oil tank right piston through oil hole (4-4) which is radially communicated is machined between the auxiliary oil tank right piston right side inner annular groove (4-1) and the auxiliary oil tank right piston right side outer annular groove (4-3), an auxiliary oil tank right piston left side annular groove (4-2) is machined on the inner side of the left end of the auxiliary oil tank right piston (4), sealing ring grooves are machined on the inner side and the outer side of the middle part of the auxiliary oil tank right piston (4), and an auxiliary oil tank right piston inner sealing ring and an auxiliary oil sealing; steps are processed at the left end and the right end of the damper piston (6), a first damper piston oil through hole (6-1) which is radially communicated is processed on the left step of the damper piston (6), a second damper piston oil through hole (6-4) which is radially communicated is processed on the right step of the damper piston (6), a first damper piston normally-open one-way valve (6-2) and a second damper piston normally-open one-way valve (6-3) are installed inside the damper piston (6), an outlet of the first damper piston normally-open one-way valve (6-2) is communicated with the first damper piston oil through hole (6-1), an outlet of the second damper piston normally-open one-way valve (6-3) is communicated with the second damper piston oil through hole (6-4), and an inlet of the first damper piston normally-open one-way valve (6-2) is communicated with an inlet of the second damper piston normally-open one-way valve (6-3) Are communicated with each other; a damper piston damping hole (6-5) is formed in the damper piston (6), the left end of the damper piston damping hole (6-5) is communicated with a damper piston first oil through hole (6-1), and the right end of the damper piston damping hole (6-5) is communicated with a damper piston second oil through hole (6-4); an auxiliary oil tank left piston left side inner annular groove (8-1) is machined on the inner side of the left end of an auxiliary oil tank left piston (8), an auxiliary oil tank left piston left side outer annular groove (8-3) is machined on the outer side of the left end of the auxiliary oil tank left piston (8), an auxiliary oil tank left piston through oil hole (8-4) which is radially communicated is machined between the auxiliary oil tank left piston left side inner annular groove (8-1) and the auxiliary oil tank left piston left side outer annular groove (8-3), an auxiliary oil tank left piston right side annular groove (8-2) is machined on the inner side of the right end of the auxiliary oil tank left piston (8), sealing ring grooves are machined on the inner side and the outer side of the middle part of the auxiliary oil tank left piston (8), and an auxiliary oil tank left piston inner sealing ring and outer sealing ring are respectively; a left end cover annular oil groove (9-1) is machined in the middle of an inner hole of the left end cover (9), a left end cover first step (9-3), a left end cover second step (9-4) and a left end cover third step (9-5) are sequentially machined on the outer circumferential wall of the left end cover (9) from right to left, a left end cover oil through hole (9-2) is radially machined in the upper portion of the left end cover second step (9-4), and the left end cover oil through hole (9-2) is communicated with the left end cover annular oil groove (9-1); the right end and the left end of the middle cylinder barrel (12) are respectively provided with a middle cylinder barrel right oil through hole (12-1) and a middle cylinder barrel left oil through hole (12-2) which are radially communicated; the right pin head (1) and the right end cover (2) are reliably connected into a whole; the right end of the inner cylinder barrel (5) is sleeved on the first step (2-4) of the right end cover, and reliable sealing is formed between the inner hole of the right end of the inner cylinder barrel (5) and the first step (2-4) of the right end cover; the damper piston (6) and the damper piston rod (7) form reliable connection and sealing; the damper piston (6) and the damper piston rod (7) are inserted into the inner cylinder (5), and reliable sealing and guiding are formed between the damper piston (6) and the inner cylinder (5); the auxiliary oil tank right piston (4), the auxiliary oil tank piston return spring (11) and the auxiliary oil tank left piston (8) are sequentially sleeved on the outer cylindrical wall of the inner cylinder barrel (5) from left to right, the left end of the auxiliary oil tank piston return spring (11) is installed into an auxiliary oil tank left piston right annular groove (8-2), the right end of the auxiliary oil tank piston return spring (11) is installed into an auxiliary oil tank right piston left annular groove (4-2), the left end and the right end of the auxiliary oil tank piston return spring (11) respectively abut against the auxiliary oil tank left piston (8) and the auxiliary oil tank right piston (4), and reliable sealing is formed between the auxiliary oil tank right piston (4), the auxiliary oil tank left piston (8) and the outer cylindrical wall of the inner cylinder barrel (5); the middle cylinder barrel (12) is sequentially sleeved on the auxiliary oil tank left piston (8), the auxiliary oil tank right piston (4) and the right end cover third step (2-6) from left to right, and reliable sealing is formed between the inner hole of the middle cylinder barrel (12) and the outer walls of the auxiliary oil tank left piston (8) and the auxiliary oil tank right piston (4) respectively; the right end of the outer cylinder barrel (3) is reliably connected and sealed with the right end cover (2); the left end cover (9) is sleeved on the damper piston rod (7), the first step (9-3) of the left end cover is inserted into the left end of the inner cylinder barrel (5), the third step (9-5) of the left end cover is inserted into the left end of the middle cylinder barrel (12), and meanwhile, the outermost circumference of the left end cover (9) is inserted into the left end of the outer cylinder barrel (3); the left end cover (9) and the left end of the outer cylinder barrel (3) form reliable connection and sealing; a reliable seal is formed between the first step (9-3) of the left end cover and the left end of the inner cylinder barrel (5); a dustproof device and a sealing device are respectively arranged on the left side of the annular oil groove (9-1) of the left end cover between the left end cover (9) and the damper piston rod (7), and reliable dustproof and sealing are formed between the left end cover (9) and the damper piston rod (7); a sealing device and a guiding device are respectively arranged on the right side of the annular oil groove (9-1) of the left end cover between the left end cover (9) and the damper piston rod (7), and reliable sealing and guiding are formed between the left end cover (9) and the damper piston rod (7); the left pin head (10) is reliably connected with the left end of the damper piston rod (7); the right inner annular groove (4-1) of the right piston of the auxiliary oil tank is communicated with the right end cover oil through hole (2-3); the left inner annular groove (8-1) of the left piston of the auxiliary oil tank is communicated with the oil through hole (9-2) of the left end cover; a damper left working cavity A is formed between the left side of the damper piston (6) and the left end cover (9), a damper left working cavity B is formed between the right side of the damper piston (6) and the right end cover (2), and a return spring cavity C is formed between the auxiliary oil tank left piston (8) and the auxiliary oil tank right piston (4); an auxiliary oil tank left oil chamber D is formed between the left end cover (9) and the auxiliary oil tank left piston (8); an auxiliary oil tank right oil chamber E is formed between the right end cover (2) and the auxiliary oil tank right piston (4); an annular oil passage F is formed between the outer wall of the middle cylinder barrel (12) and the inner wall of the outer cylinder barrel (3); the left end cover annular oil groove (9-1), the left end cover oil through hole (9-2), the auxiliary oil tank left oil chamber D, the middle cylinder barrel left oil through hole (12-2), the annular oil through path F, the middle cylinder barrel right oil through hole (12-1), the auxiliary oil tank right oil chamber E and the right end cover oil through hole (2-3) are communicated with each other; the hydraulic damper working oil is filled in the damper left working cavity A, the damper left working cavity B, the auxiliary oil tank left oil chamber D, the auxiliary oil tank right oil chamber E, the annular oil passage F and the communicated oil through holes and oil grooves through oil filling ports; and working oil in the annular oil groove (9-1) of the left end cover is in a low-pressure state.
2. The hydraulic damper with external leakage service prevention function according to claim 1, characterized in that: and working oil in the auxiliary oil tank left oil chamber D and the auxiliary oil tank right oil chamber E is in a low-pressure state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010619058.XA CN111895024A (en) | 2020-06-30 | 2020-06-30 | Hydraulic damper with external leakage service prevention function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010619058.XA CN111895024A (en) | 2020-06-30 | 2020-06-30 | Hydraulic damper with external leakage service prevention function |
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| CN111895024A true CN111895024A (en) | 2020-11-06 |
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| CN202010619058.XA Withdrawn CN111895024A (en) | 2020-06-30 | 2020-06-30 | Hydraulic damper with external leakage service prevention function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000320599A (en) * | 1999-05-07 | 2000-11-24 | Kayaba Ind Co Ltd | Damping force generation structure of hydraulic damper |
| KR20110129023A (en) * | 2010-05-25 | 2011-12-01 | 주식회사 만도 | Sealing unit for a shock absorber |
| CN103527697A (en) * | 2013-11-01 | 2014-01-22 | 武汉天捷重型装备股份有限公司 | Hydro-pneumatic spring suspension cylinder |
| CN108533659A (en) * | 2018-05-11 | 2018-09-14 | 南京林业大学 | A kind of mechanical automatic adjustment pressure fluid linking damper |
| CN108953461A (en) * | 2018-07-12 | 2018-12-07 | 河海大学常州校区 | A kind of in-line arrangement hydraulic damper |
| CN109340295A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A kind of hydraulic damper of the auxiliary fuel tank with air bag |
-
2020
- 2020-06-30 CN CN202010619058.XA patent/CN111895024A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000320599A (en) * | 1999-05-07 | 2000-11-24 | Kayaba Ind Co Ltd | Damping force generation structure of hydraulic damper |
| KR20110129023A (en) * | 2010-05-25 | 2011-12-01 | 주식회사 만도 | Sealing unit for a shock absorber |
| CN103527697A (en) * | 2013-11-01 | 2014-01-22 | 武汉天捷重型装备股份有限公司 | Hydro-pneumatic spring suspension cylinder |
| CN108533659A (en) * | 2018-05-11 | 2018-09-14 | 南京林业大学 | A kind of mechanical automatic adjustment pressure fluid linking damper |
| CN108953461A (en) * | 2018-07-12 | 2018-12-07 | 河海大学常州校区 | A kind of in-line arrangement hydraulic damper |
| CN109340295A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A kind of hydraulic damper of the auxiliary fuel tank with air bag |
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Application publication date: 20201106 |